620706240 has 560 divisors, whose sum is σ = 2761634304. Its totient is φ = 128563200.

The previous prime is 620706223. The next prime is 620706241. The reversal of 620706240 is 42607026.

It is a tau number, because it is divible by the number of its divisors (560).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620706241) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1995685 + ... + 1995995.

Almost surely, 2^620706240 is an apocalyptic number.

620706240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620706240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1380817152).

620706240 is an abundant number, since it is smaller than the sum of its proper divisors (2140928064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620706240 is a wasteful number, since it uses less digits than its factorization.

620706240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 620706240 is about 24913.9768001819. The cubic root of 620706240 is about 853.0255454647.

The spelling of 620706240 in words is "six hundred twenty million, seven hundred six thousand, two hundred forty".